The 'phantom punch' is a myth and ocurred during Ali-Liston II
It was a good, clean punch. The ref for that fight was former heavyweight champ Jersey Joe Walcott, and he effed up. Liston wanted to continue, but Walcott - after initially letting the fight go on - ended it after a member of the press told thim that Liston had been down for more than 10 seconds.
'I define fear as standing across from Joe Louis and knowing he wants to go home early.' - Max Baer